The inductor from Problem $8$ is driven by a sinusoidal current source in the form:

$()=0$sin $()$

where $0=7\mathrm{.}0$ and $=120(60$ Hz$).$ With displacement held fixed at $=0$:

a$)$ Find the time$-$averaged magnetic stored energy, $$ in the inductor

b$)$ Calculate the time$-$averaged power dissipated in the winding resistance $($use the winding

resistance from Problem $8$